APA引文

Campbell, M. M., Prata, N., & Potts, M. (2013). The impact of freedom on fertility decline. BMJ Publishing Group.

Citação norma Chicago

Campbell, Martha M., Ndola Prata, and Malcolm Potts. The Impact of Freedom On Fertility Decline. BMJ Publishing Group, 2013.

MLA引文

Campbell, Martha M., Ndola Prata, and Malcolm Potts. The Impact of Freedom On Fertility Decline. BMJ Publishing Group, 2013.

警告：這些引文格式不一定是100％准確.